Vyacheslav Datsik is probably most known for his antics outside the cage, however his greatest achievement as a competitior is arguably his notorious knockout over former UFC Heavyweight Champion Andrei Arlovski at an M1 Global event in 1999.

He would also go 7 - 2 in Kickboxing winning a comeback fight in 2019 before then suffering a loss to French great Jerome LeBanner in 2019 also. After going 12 - 15 in MMA he would return to the cage in 2019 where lost via disqualification. Datsik was at one time involved in political activities, as a member of a now-banned nationalist Russian party, Slavic Union. He was relatively successful in contributing to the popularity of the party, as his name and image helped him to attract supporters.    
After originally retiring from the fight game in 2006 he was convicted of robbing multiple cell phone stores in Saint Petersburg in 2007.   
In August 2010 he escaped, by tearing a hole in the wire fence around the low security clinic, apparently using his bare hands. He then illegally crossed the border to Norway in a boat and met with Norwegian reporters. While wearing Facist symbols, he told the reporters that he was "not a nationalist, but a racist".

Joined by two facists from an ex-Soviet Baltic state living in Norway, he appeared at the International Police Immigration Service in Oslo on September 21, 2010, where he handed in a loaded weapon, declared himself a "white warrior" and requested political asylum.
As a result of this, police raided Datsik and his accomplices tattoo shop where they found multiple guns and Nazi paraphernalia including a large doll dressed up as a Nazi was found near the front entrance of the shop. They also found a stolen entrance card to the Norwegian armed forces.
 The local newspaper interviewed residents near the tattoo shop who claimed they 'often heard loud noise, screaming and banging'. The neighbors also stated they would occasionally see the occupants of the tattoo shop "practicing fighting and boxing while completely naked".

All three were then jailed. On October 18 Russian authorities sent an extradition request to Norwegian authorities

In the week of October 29, a Norwegian police physician submitted a report based on conversations with Datsik and review of available documents which concluded that he did not have a serious mental disease. Datsik's lawyers are of the opinion that Russian authorities made up the psychiattic fiagnosis and that Norwegian authorities on that ground must allow Datsik to remain in Norway. Datsik also claims that he was tortured by Russian authorities. The torture included the application of electrodes to his genitals and placing him in an iron cage for eight months, naked and handcuffed. He has twice attempted suicide in Norwegian detainment due to being isolated from the other prisoners, but he was again isolated after shouting racist remarks from his cell window.

He has asked the court to give him the maximum sentence, as he has said that it would help him live a healthier life, while announcing that he is "too raw for humanity".

Datsik was deported from Norway on March 18, 2011.